Police have released CCTV of the armed robbery at a convenience store in Balmoral last Month.
Around 8.50pm on September 7 a man entered the business on Thynne Road and approached the counter.
He then produced a knife and made demands for cash and cigarettes.
The female employee complied and the man fled the scene on foot.
The man was wearing a grey and white coloured camouflage hooded jumper, black pants and had black material covering his face.
Anyone who may recognised the man in the CCTV is urged to come forward.